LoadingCoils for 136 kHz
- This page starts by showing how to make loadingcoils for LF, and goes on to describe two of the loadingcoil assemblies used to resonate the experimental vertical antenna used at GW4ALG.

An automatically tuned 7-30MHz mobile antenna
- This is a base-loaded vertical antenna that mounts on the car's roof. The loadingcoil is designed as a variable inductor, with a three-legged chariot that travels up and down inside the coil, with grooved brass wheels running on the coil turns, and driven by a slotted rotor tube.